“…The severity of blast injuries is a function of the energy of the explosive device, the use of shrapnel and other morbidity-enhancing agents (ie, toxins), proximity to the device, and the placement of device, open vs closed space. 3,4 Primary Blast Injuries Primary blast injuries are caused by barotrauma resulting from the initial pressure wave. The most common types of injuries involve air-filled organs and air-fluid interfaces because of dynamic pressure changes at tissue-density interfaces.…”